How can we extrapolate from designers which we may observe, to designers we can not observe, or have not observed?

Does knowing that a piece of stick and leaves is made by a caddisfly, or that scratches on a tree were made by a giant felid, give you any additional leverage in attempting to peek up Dame Nature's skirt?

How does one justify saying "Well, we know that foxes crap on top of logs, and there is crap on top of that log. Let's use this method to determine whether or not we are living in the best of all possible worlds?"

--------------You're obviously illiterate as hell. Peach, bro.-FtK

Finding something hard to believe based on the evidence, is science.-JoeG